Chelsea, MA Profile: Facts & Data


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Chelsea, Massachusetts - Basic Facts

The City of Chelsea had a population of 41,821 as of July 1, 2023. Chelsea ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Massachusetts. See peer rankings below.

The primary coordinate point for Chelsea is located at latitude 42.3918 and longitude -71.0328 in Suffolk County. The formal boundaries for the City of Chelsea encompass a land area of 2.21 sq. miles and a water area of 0.25 sq. miles. Suffolk County is in the Eastern time zone (GMT -5).

The City of Chelsea has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Jump to... (On This Page!)
  1. Chelsea 2023 Demographic Data
  2. Growth Rates for Chelsea (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Massachusetts Research Tools (Easy Tools & Current Data)
  3. Massachusetts Data Comparison Tool - 2023 Demographics

Chelsea, MA Data & Demographics (As of July 1, 2023)


Total Population 41,821 (100%)
Population in Households 41,089 (98.2%)
Population in Families 30,753 (73.5%)
Population in Group Quarters1 732 ( 1.8%)
Population Density 18,849
Diversity Index2 83


Median Household Income $63,770
Average Household Income $89,144
% of Income for Mortgage4 47%
Per Capita Income $30,390
Wealth Index5 53
Socioeconomic Status Index6 Low (34.8)


Total HU (Housing Units) 14,926 (100%)
Owner Occupied HU 3,799 (25.5%)
Renter Occupied HU 10,438 (69.9%)
Vacant Housing Units 689 ( 4.6%)
Median Home Value $498,054
Average Home Value $516,673
Housing Affordability Index3 53


Total Households 14,237
Average Household Size 2.89
Family Households 8,719
Average Family Size 4.00
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.


2020-2023 2023-2028
Population 0.77% 0.51%
Households 0.98% 0.78%
Families   0.85%
Median Household Income   2.41%
Per Capita Income   3.65%
Owner Occupied HU   1.06%

Chelsea, MA - Peer Comparisons by Rank and Percentile

The table below compares Chelsea to the other 248 incorporated cities, towns and CDPs in Massachusetts by rank and percentile using July 1, 2023 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 36 86th
Population Density # 3 99th
Median Household Income # 211 15th
Housing Affordability Index # 42 17th
Per Capita Income # 242 3rd
Diversity Index # 5 98th

Additional comparisons and rankings can be made with a VERY EASY TO USE Massachusetts Census Data Comparison Tool.

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